Analysis

  • max time kernel
    294s
  • max time network
    197s
  • platform
    windows10-1703_x64
  • resource
    win10-20231215-en
  • resource tags

    arch:x64arch:x86image:win10-20231215-enlocale:en-usos:windows10-1703-x64system
  • submitted
    14/01/2024, 22:24

General

  • Target
    aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe
  • Size 733KB
  • Sample240114-2bfbgaddbq
  • SHA256 aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • djvu

C2
  • http://habrafa.com/test1/get.php

Attributes
  • extension

    .cdpo

  • offline_id

    Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1

  • payload_url

    http://brusuax.com/dl/build2.exe

    http://habrafa.com/files/1/build3.exe

  • ransomnote

    ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-FCWSCsjEWS Price of private key and decrypt software is $1999. Discount 50% available if you contact us first 72 hours, that's price for you is $999. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0844OSkw

rsa_pubkey.plain

Signatures

  • Detect Vidar Stealer 6 IoCs
  • Detected Djvu ransomware 16 IoCs
  • Djvu Ransomware

    Ransomware which is a variant of the STOP family.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 11 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 7 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe
    "C:\Users\Admin\AppData\Local\Temp\aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3324
    • C:\Users\Admin\AppData\Local\Temp\aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe
      "C:\Users\Admin\AppData\Local\Temp\aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:4472
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\1e930f1b-e474-4eab-8d2e-7eb4861890a1" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4044
      • C:\Users\Admin\AppData\Local\Temp\aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe
        "C:\Users\Admin\AppData\Local\Temp\aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1556
        • C:\Users\Admin\AppData\Local\Temp\aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe
          "C:\Users\Admin\AppData\Local\Temp\aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1612
          • C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build2.exe
            "C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build2.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:3152
            • C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build2.exe
              "C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build2.exe"
              6⤵
              • Executes dropped EXE
              PID:4536
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4536 -s 2104
                7⤵
                • Program crash
                PID:4624
          • C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build3.exe
            "C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build3.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious use of WriteProcessMemory
            PID:376
            • C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build3.exe
              "C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build3.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3120
              • C:\Windows\SysWOW64\schtasks.exe
                /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
                7⤵
                • Creates scheduled task(s)
                PID:1484
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2452
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4444
      • C:\Windows\SysWOW64\schtasks.exe
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"
        3⤵
        • Creates scheduled task(s)
        PID:2500
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    PID:4436
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:1304
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    PID:4140
    • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
      2⤵
      • Executes dropped EXE
      PID:2492
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe
    1⤵
    • Executes dropped EXE
    PID:4396

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 1KB
        • SHA256 0da3f6452b91947ed4ad5e11a34cb348a7da0276e2ee8f8f27d5f3b3987dd1bd
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 724B
        • SHA256 58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
        • MD5 SHA1 SHA512

        24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
        • Size 410B
        • SHA256 4a602aeb11260b28030ac99b04aa8477ebc19c0dd70078ad306e1032a08760b2
        • MD5 SHA1 SHA512

        CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
        • Size 392B
        • SHA256 8313888284b38c27e5dcace5666a269402621c3dba7f694f88d404ad896fdc1f
        • MD5 SHA1 SHA512

        aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe

        • Path C:\Users\Admin\AppData\Local\1e930f1b-e474-4eab-8d2e-7eb4861890a1\aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293.exe
        • Size 733KB
        • SHA256 aa0d51394f696edbe195cb4e279f135f85a5acad6eed5d2cb542c06816cf2293
        • MD5 SHA1 SHA512 SSDEEP

        build2.exe

        • Path C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build2.exe
        • Size 358KB
        • SHA256 26063c78e5418610471a9f3a00a155d7d1e5b29856e1979ba3bdc42681a871d0
        • MD5 SHA1 SHA512 SSDEEP

        build3.exe

        • Path C:\Users\Admin\AppData\Local\9b447289-7783-4116-921a-7c41a086e899\build3.exe
        • Size 299KB
        • SHA256 fef2c8ca07c500e416fd7700a381c39899ee26ce1119f62e7c65cf922ce8b408
        • MD5 SHA1 SHA512 SSDEEP

        memory/376-81-0x0000000000820000-0x0000000000920000-memory.dmp

        memory/376-84-0x0000000000920000-0x0000000000924000-memory.dmp

        memory/1556-20-0x0000000002110000-0x00000000021B0000-memory.dmp

        memory/1612-37-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1612-38-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1612-23-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1612-22-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1612-24-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1612-62-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1612-29-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1612-30-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1612-34-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/1612-36-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/2452-121-0x00000000009B0000-0x0000000000AB0000-memory.dmp

        memory/2452-110-0x00000000009B0000-0x0000000000AB0000-memory.dmp

        memory/3120-87-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3120-85-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3120-80-0x0000000000400000-0x0000000000406000-memory.dmp

        memory/3152-48-0x00000000005C0000-0x000000000060B000-memory.dmp

        memory/3152-47-0x0000000000750000-0x0000000000850000-memory.dmp

        memory/3324-1-0x0000000001FC0000-0x000000000205F000-memory.dmp

        memory/3324-2-0x00000000021C0000-0x00000000022DB000-memory.dmp

        memory/4140-165-0x0000000000B80000-0x0000000000C80000-memory.dmp

        memory/4436-137-0x0000000000880000-0x0000000000980000-memory.dmp

        memory/4472-4-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4472-3-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4472-5-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4472-6-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4472-17-0x0000000000400000-0x0000000000537000-memory.dmp

        memory/4536-66-0x0000000000400000-0x000000000065E000-memory.dmp

        memory/4536-52-0x0000000000400000-0x000000000065E000-memory.dmp

        memory/4536-49-0x0000000000400000-0x000000000065E000-memory.dmp

        memory/4536-53-0x0000000000400000-0x000000000065E000-memory.dmp